All the hosting categories is based on
wikipedia that listed types of hosting they have out
there. Many Companies does not offer the exact same
products or services and the most common products
are shared, reseller because this is the easiest one
to setup. VPS and Dedicated need more resources and
knowledge to setup especially VPS have many types of
Virtualization such as: KVM, OpenVZ.

Most popular control panel is Cpanel / WHM. WHM is Web
Host Manager only offer for Reseller Hosting not Shared
Hosting.